Abbreviations: Ci -intercellular CO2 concentration; E -transpiration rate; gs -stomatal conductance; LI -light interception of the stand; LMA -leaf mass per unit area; LUE -light-use efficiency; MDH -malate dehydrogenase; ME -malic enzyme; N area -nitrogen content per unit area; PEPC -phosphoenolpyruvate carboxylase; PN -net photosynthetic rate; PNUE -photosynthetic nitrogen-use efficiency; PPDK -pyruvate orthophosphate dikinase.
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